<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="author" content="wangbo">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>鼠标样式的设置</title>
  <style>
    input{
      /* 不需要外边框 */
      outline:none;
      border: 1px solid red;
    }
    textarea{
      /* 文本域不许更改,文本域也有外边框 */
      resize: none;
      outline:none;
    }

  </style>
</head>
<body>
 输入框 <input type="text">
 <!-- 文本域,写多行的数据 -->
 文本域 <textarea name="" id="" cols="30" rows="10"></textarea>
</body>
</html>